Method of treating food waste using acidogenic koji mold

Abstract

A method of treating food waste by fermenting a raw material comprising the food waste by means of a koji mold to obtain a liquid substance. The koji mold is a koji mold belonging to genus Aspergillus capable of producing citric acid. The liquid substance comprises a citric add produced by the koji mold and has a pH of 5.5 or less. The method enables food waste to be used for feed without the problems usually associated with pig farming techniques using garbage. Additionally, the method allows food wastes to be preserved for a long time without putrefaction. Also offered is a feed composition comprising a treated food waste.

Description

BACKGROUND OF THE INVENTION[0001](1) Field of the Invention[0002]The present invention relates to a method of treating food waste using an acidogenic koji mold.[0003](2) Description of the Related Art[0004]The raising of pigs using garbage was common in the 1960's. However, improvements in living standards have raised the bar for pork quality, and such methods have largely fallen out of use today. The following three reasons can be given.[0005]First, the oils contained in garbage can cause the fat in the pork to turn translucent or take on a yellowish tinge. This is the main reason.[0006]Second, the development of blended feeds capable of quickly fattening pigs has made the raising of pigs using garbage unattractive due to the fact that garbage has an unstable nutritional content and therefore requires a longer fattening time. Third, garbage normally has a high water content of about 80%, so that it easily putrefies and is difficult to store.[0007]On the other hand, the prospect of ...

AI Technical Summary

Benefits of technology

[0015]Therefore, the present invention offers a method of using food waste for feeds which solves the problems of conventional garbage-based pig farming. Additionally, the present invention offers a method of preserving food waste without allowing it to putrefy.

Problems solved by technology

However, improvements in living standards have raised the bar for pork quality, and such methods have largely fallen out of use today.

First, the oils contained in garbage can cause the fat in the pork to turn translucent or take on a yellowish tinge.

Second, the development of blended feeds capable of quickly fattening pigs has made the raising of pigs using garbage unattractive due to the fact that garbage has an unstable nutritional content and therefore requires a longer fattening time.

Third, garbage normally has a high water content of about 80%, so that it easily putrefies and is difficult to store.

1. In the anaerobic state, the feed can be inadequately stirred, in which case some of it may undergo methane fermentation, which is not appropriate for feeds.

2. Lactic acid bacteria cannot easily decompose oils, which tends to reduce the meat quality.

3. The feed content is often inconsistent, making it necessary to supplement nutrients using existing feeds, which makes the work bothersome.

1. Since the process requires garbage, which has a high water content, to be dried by heating, it involves very high processing costs often exceeding 100 US dollars per ton of garbage processed.

2. While being heated, the oils contained in the garbage can oxidize, thus reducing their quality.

3. Since the resulting feed has a high oil content (normally about 20%), no more than 10% can be added to blended feeds.

Due to the above-described problems, no highly economical garbage feeding methods have been developed until now.

Therefore, its transport involves difficulties in that manual labor is required for handling.

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